SPP How Solar Works

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SPP How Solar Works

  1. 1. How a Distributed Solar System Works TM 1. Solar panels use the sunlight to generate direct current (DC) elec- About solar panels tricity, which then flows to a combiner box where all wires from all A solar panel, also known as a panels come together. solar module, consists of individual photovoltaic (PV) cells that are interconnected. The majority of PV 2. Larger solar systems usually have several combiner boxes that consol- cells today are made of wafer-based idate all wires into a higher capacity wire that transfers the DC power crystalline silicon. These cells have to the inverter. the ability to convert sunlight directly into electricity through the photo- voltaic effect. An assembly of solar 3. The inverter’s main job besides adjustment of power and safety is to panels makes up a solar array. Solar condition the DC power to alternating current (AC), the form of elec- panels can be installed on rooftops, tricity that is used most commonly. ground mounted, in open areas, or elevated on parking lots. 4. Once converted to AC power, the electricity runs through the Utility AC Disconnect where the solar system can be disconnected manually About net metering If the production of solar energy from the grid electricity system. A data acquisition system records exceeds consumption, the surplus real time data and sends to system management team. energy is fed into the utility electric- ity grid. In this process, the utility 5. The final station before the power flows into the building or gets fed meter at the main switch gear will spin backwards and build valuable into the utility grid is the main switch gear of the building. This is also credits for the customer. the place where net metering takes place. Weather Station About monitoring systems SPP provides real-time string level performance monitoring on each Combiner Boxes of its systems. Monitoring systems (DC string level monitoring) compare expected power produc- tion with actual power production in real time. The Data Acquisition System, which receives data from an SPP-installed weather station and data from the inverter as well as from each combiner box, transmits all information via internet to SPP’s Asset Management team. Automatic alarms alert SPP’s Asset Management team if there is an irregularity at any system. Utility Grid Inverter AC Utility Disconnect 415.389.8981• 866.361.1439 Grid Tie-In info@solarpowerpartners.com (Main switch gear) 100 Shoreline Highway, Suite 210 B, Data Acquisition System (Internet connection) Utility Meter Mill Valley, CA 94941 www.solarpowerpartners.com ©2009 Solar Power Partners, Inc.

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